Apparatus for forming molds.



P. C. GOODWIN. APPARATUS PoR PORMING MoLDs.

il.; APPLICATION FILED SEPT. 6, 1912. 1, 1 83.020.

Patented Mar. 23, 1915.

2 SHEETS-SHEET l.

. INVENTOR. wf/M Pdf,

lll

WTNESSES v y THE NORRIS PETERS CO?. PHOTO-LITHQ. WSHINGTNY DV C.l

P. c. GOODWIN. APPARATUS FOR FORMING MOLDS.

APPLICATION FILED SEPT. G, 1912.

Patented Mar. 2.3, 1915. v

2 SHEETSSHEET 2.

DTG-LITHO., WASHING FON, D. C4

Lieaoao.

` tra@ 'sTAmns 'PATENT @Fmgg FREDERICK C. GOODWIN, OFLOUIsvrLLE, KENTUCKY, AssrCNoR. To-MODKN CONSTRUCTION COMPANY, :or LoUrsvILLnKnNrUCKY, A CORPORATIONl on KENTUCKY.

To 'all whom 'it may concern.' A Y Be it known that I, FREDERICK.C.` GOOD- wIN, a citizen of the United States, residing i at Louisville, in the county of Jefersonand claims following the description.

State of Kentucky, have invented certain new and useful Improvements in Apparatus for Forming Molds; and .I do hereby declare the following to be a` full, clear, and A' ties Or impressions while the cores are in the mass, and to remove said cores without injuring the mold thus formed.

Another object is to completely form multiple cavity mold, resembling one side A' ofa honeycomb, directly in the receptacle or container for the plastic or melted mass, said receptacle or container serving as an outer mold and thus dispensing with separate Outer'mold walls such as are generally used in conjunction with the cores. Y

The invention will hereinafter: be first fully described with reference ,to the accompanying drawings, whichform a part of this specification, and then vpointed out. 1n the In the drawings: Figure 1' 1s a perspective x view of the apparatus, showing the cores ready to be pressed into the'plastic or meltedv mass.Y Fig.`2 is av perspective. view -illustrating the arrangement of the apparatus after the coreshavebeen withdrawn from the lmass, some of the cores having been removed to more Clearly show the construction ofthe lower or stripper frame. 1 Fig. Bis a transverse vertical section of the apparatus with the cores pressed into plastic mass. Fig. 4; is a fragmentary horizontal section through the lower frame and cores. Fig. 5 is an enlarged detail view of one-of the-cores, showing more clearly how they 'are suspended from the parallel flexible'strips of the upper frame, and also illustrating the piping Afor the cooling or freezing agent. f

' Referring to the drawings 'by'letters of reference, A designates a receptacleor con- Appliieation led September 6, i912. Serial No. 718,908.

Vsize andspacing of Vthe cores.' V,Suitably sup,

'andvend pieces al. The lower'fralne, however, 'isjnot connected directly to the' cores APPARATUS Fon Fo'iuxrINerv ivrorins.

y Speeicaton of LettersPatentg v Y 23,

tainerfor the ormeltedniass such y `as paraffin. vThe shapeandsize of the vcontainermay conform vto the number, shape,

ported abovefsaid-container are' a plurality of cores B suspended vvfrom anupper 'frame C and, projecting through -a 'lowerframe D;

`The upperframe consists of a plurality Of made` of flexible metal-,zwith their ends suit-r' ably secured 1n' transverse end pieces F,'as

parallel longitudinal strips'E, preferablyfA 'Y i T by lugs or tenonse on the ends of said? strips engaging longitudinal grooves or channels f in the end pieces. f Said longitudinal strips are provided with openings or per-forations into whichpins or projections?) on the upper end portions of the cores ar'eloosely fitted f for vsuspending or supporting said cores.

It-will readilybe seen-that the strips "E separate adjacent' sides of. the cores-f- 'll-he ends of said cores are spaced apart by` sepa.

. rators Z9', one of Ywhich may vbe-providedon the end of each*`cOre, so"'that^each core iis separated Or spaced all around ivfrom 4'the adjacent cores,` The outer edges of tl-iesepa'- rators, which edges contact with the adj acent cores for positively spacing'said cores apart, may be tapered, as illustrated-inFig. 5, so as not to interfere with the cores being rockedv i slightly Yiniivitlidrawing'them from the'finished mold 'tO- prevent breaking-the latter, as

' hereinafter explained;v Y

The lower frame D 'Inay beV constructed in comprises la series-of longitudinalstrips-@Z but is free to'move up and down' around *a similar manner tof'the upperfframe, and `l them with thestrips al working in the spaces i between thesides of saidj'cores. r".l.`-he:end pieces ofboth frames *are preferably made of heavier metal than the longitudinal strips, in orderto support the-latter in the channels ofsaid end pieces' under the stress to vwhich the device is subjected iii/operation.A Said end pieces may ,-be heldin proper rela# tion totheir longitudinal strips by tie-rods c i and cl2 -on the upper and, lowerfframes', `re-` spectively.

The two vfray-mes arei adj ustably connected in any suitable manner, whereby o'ne vmay be moved vertically with respect to the otherv in Order to withdraw all of the cores at oncel Y As illustrated, this connectingmeans may consist of a system. ofl vertically disposed according to the direction of rotation of said cranks. Y

Each of the cores B is adapted to be cooled or chilled in order to congeal or harden the plastic mass M in the container or receptacle A. For this purpose, said cores may be made hollow, as illustrated in Figs. 3, t and 5, and have a pipe N'for a cooling or freezing agent extending into the interior thereof. lt will be understood, however, that any other suitable means for chilling the cores may be employed.

ln the; operation of the apparatus it is optional Whether the receptacle or container A be raised to insert the cores into the plastic mass, or whether said cores be lowered into the receptacle. For the purpose of explanation, it may be understood that` the two frames with thecores are suspended or supported in any suitable manner, as by the hangers l? depending from a fixture and attached tothe upper frame, and that the receptacle is placed upon a platform R adapted to be raised and lowered by any known means which it is deemed unnecessary to illustrate. Supposing then that the receptacle and cores are supported as just described and arranged as shown in Fig. l, and that a requisite quantity of melted par aflin or other plastic mass M is contained in said receptacle, the raising of the latter will cause the cores to be inserted into said mass as illustrated iny Fig. 3. The cores, be-

ing chilled, will cause the paraffin or plastic mass to harden around them in the container, thereby forming a multiple cavity mold as shown in Fig. 2. After the mass has become ksuciently hard, which is accomplished very quickly, the receptacle or container is lowered, the lower frame B being lowered simultaneously until the mold is entirely removed or stripped from the cores. The lower frame being in contact with the upper surface of the hardened mass positively retains it in the container as the cores are withdrawn from said mass. The receptacle or container Vmay then be moved away from the device and is ready for casting the concrete bricks or other articles in the multiple cavity mold thus formed in the hardened mass. After the bricks or other articles are cast, the mold may be readily removed by meltino.

It will be noted that the lugs or projections b on the cores have a slightmovement in the openings e in thev longitudinal strips of the upper frame. This slight movement enables the print or mold to be made perfect in shape without danger of breaking said mold when withdrawn. lt will also be seen that on account of the ieXibility of the longitudinal strips of the frames and the manner of suspending the cores from the upper frame, said cores may be readily removed when necessary or desirable for repairs or other purposes, and yet, when in place, said cores are held securely against accidental displacement.

Vhile the apparatus herein illustr ted and described is designed particularly for forming paraflin molds to be used in the manufacture of concrete bricks, l do not desire tc limit the invention in its application to any special kind of molds, inasmuch as the same apparatus may be employed for forming molds of other plastic or meltable materials for various purposes. lt should also be understood that a mold with a single cavity or impression may be made with this apparatus, as well as a multiple cavity mold, by simply using a single core and correspondingly shaped container' for the plastic mass. Moreover, the shape of the cores may be varied as desired subject to the limitation that their side and ond walls must not be inclined outwardly and vdownwardly for, if they were, it would be impossible to withdraw said cores without mutilating the mold.

The plastic or melted mass referred te herein should be construed to cover any soft mass which is adapted to be hardened by a change of temperature as, for example, melted paraffin which may be hardened by ccoling.

As best illustrated in Fig. 5, each of the coresB may have one supporting pin Z) on one side and two. of said pins on the other side; and the strips E of the upper frame be provided with openingsc corresponding in number and arrangement to said pins. Accordingly, the intermediate strips E, two of which are shown in Fig. 5, are provided with threeopenings opposite each core, the core at one side of each strip having one pin entering the middle opening and the core at thel opposite side having two pins entering the other two openings.

Having thus described my invention, what l claim as new and desire to secure by Letters Patent is:

l. In apparatus for forming paraffin molds to be used in the manufacture of concrete bricks and the like, the combination with a container for soft paraiiin, of a plurality of cores spaced apart and adapted to be simultaneously inserted into and simulllO Licaoao i taneously withdrawn from the paraffin mass in the container, cooling means in the coresr for hardening the mass around and between the cores while they are in the container, and

means movabley toward and away from the container and adapted'to remain in contact with the outer edge of the hardened mass `when the cores are withdrawn therefrom `leaving saidv mass 1n the container 1n the form of a multiple cavity pose specified.

2. In apparatus for forming parafiin molds toy be used'in the manufacture of concrete bricks and the like, the-,combination with a container for soft paraffin, said container having asubstantially flat internall bottom surface, of a plurality of cores spaced apart and adapted to be inserted into-and withdrawn from the parafn mass in the container, the mass filling the spaces between said cores when the same are inserted into it, and means arranged in said cores for changing the temperature thereof to cause the mass around and between them to harden and form said mass into an integral multiple cavity mold, the adjacent cavities of which have common separating walls.

3. In apparatus for forming paraffin molds tobe used in the manufacture of concrete bricks and the like, the combination with a container for soft paraffin, of a frame mold for the purhaving a series of strips arranged side by side, a plurality of cores suspended between and spaced apart by said strips, a lower frame `also having aseries of strips extendingvbetween said, cores, means for moving 'the cores and both frames together toward they container for pressing the cores into the paraiiin mass therein, and means for moving the vcores and upper frame away from the container while the lower frame is retained in contact with the outer edge of the mass,

and cooling means'in the cores for harden- Y ing the mass when said cores are pressed into y the same.

4:. The combination with a frame having i' i a series' of flexible strips arranged side by. side and provided with openingsA in their vertical faces, ofak plurality of cores having pins engaging said openings, for suspending a series of strips arranged side by side, of a plurality of coressuspended; betweeneach Ypair of adjacent" strips, and separators mounted on the cores-and extending between adjacent cores for positively spacing the lthem to contact'with theouter` surfaceof 60,

cores apart along the strips, atv the 'same time` leaving' said cores separate and independent of p one another.

6. The combination with a frame-having j series of'strips arranged side by side, of a plurality of cores suspended between each pair of adjacent strips, andintegral separators on the coresand extending into contact v with the outer surface of adjacent cores for positively spacing them lapart along `the strips, at the same timeleaving saidcores' separat'eand independent of one another.

7 The combination with a frame having a series of strips arranged side by side, of a row of rcores loosely suspended between each pair of Vadjacent strips, and separators mounted on the cores and extending be,-

`tween them to contact with adjaoentcores for positively spacing them apart along the o strips,`said separators having their outer contacting edges tapered to permit the coresA to be rocked slightly for the. purpose specified;

In testimony whereof I affix myl signature in the presence'of two witnesses.

FREDERICK o'. Goonwm.

-V Witnesses:

DAVIS W. EDWARDS, MABEL Gross.

Copies of this patent may be obtained for Vfive cen'tsjeach, by addressing the @Commissioner of Patents;`

l i WashingtongD. G. i 

